Humminbird - Fish Finders and GPS
Humminbird - Fish Finders and GPS
Humminbird - Fish Finders and GPS
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Display Problems<br />
There are several main conditions or sources of possible interference that may cause problems with the quality of the information displayed on the control head.<br />
Look in the following table for some symptoms of display problems <strong>and</strong> possible solutions:<br />
Problem<br />
The control head loses power at high<br />
speeds.<br />
When the boat moves at higher speeds,<br />
the bottom disappears or suddenly<br />
weakens, or the display contains gaps.<br />
Possible Cause<br />
If the power output of your boat’s engine is unregulated, the control head may be protecting itself using<br />
its over-voltage protection feature. Make sure the input voltage does not exceed 20 Volts.<br />
The transducer position may need to be adjusted. A mix of air <strong>and</strong> water flowing around the transducer<br />
(cavitation) may be interfering with the interpretation of sonar data. See your Installation Guide for<br />
suggestions on adjusting the transducer position.<br />
Electrical noise from the boat’s engine may be interfering with sonar reception. See Finding the Cause<br />
of Noise for more information.<br />
There are no fish detected, even when you<br />
know they are in the water under the<br />
boat, or sonar readings seem weak or<br />
faulty.<br />
Sonar readings may be affected if the transducer is not positioned correctly (i.e. mounted at an angle,<br />
not straight down), or there is some kind of mechanical interference, either because it is mounted inside<br />
a hull that is too thick for proper sonar transmission, the bond between the transducer <strong>and</strong> the hull is<br />
not airtight, or because the transducer is dirty. Check with your Installation Guide for guidance on repositioning<br />
the transducer, <strong>and</strong> make sure the transducer is clean.<br />
Low battery voltage may be affecting the power of signal transmission.<br />
Electrical noise from the boats engine may be interfering with sonar reception. See Finding the Cause<br />
of Noise for more information.<br />
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